AP_Camera: add and use AP_CAMERA_SERVO_ENABLED

libraries/AP_Camera/AP_Camera.cpp

@@ -86,9 +86,12 @@ void AP_Camera::init()
         CameraType camera_type = get_type(instance);
 
         // check for servo camera
-        if (camera_type == CameraType::SERVO) {
+        if (false) {
+#if AP_CAMERA_SERVO_ENABLED
+        } else if (camera_type == CameraType::SERVO) {
             _backends[instance] = new AP_Camera_Servo(*this, _params[instance], instance);
             _num_instances++;
+#endif
 
 #if AP_CAMERA_RELAY_ENABLED
         // check for relay camera

libraries/AP_Camera/AP_Camera.h

@@ -47,7 +47,9 @@ public:
     // enums
     enum class CameraType {
         NONE = 0,           // None
+#if AP_CAMERA_SERVO_ENABLED
         SERVO = 1,          // Servo/PWM controlled camera
+#endif
 #if AP_CAMERA_RELAY_ENABLED
         RELAY = 2,          // Relay controlled camera
 #endif

libraries/AP_Camera/AP_Camera_Servo.cpp

@@ -1,6 +1,6 @@
 #include "AP_Camera_Servo.h"
 
-#if AP_CAMERA_ENABLED
+#if AP_CAMERA_SERVO_ENABLED
 
 #include <SRV_Channel/SRV_Channel.h>
 
@@ -68,4 +68,4 @@ void AP_Camera_Servo::configure(float shooting_mode, float shutter_speed, float
     }
 }
 
-#endif // AP_CAMERA_ENABLED
+#endif // AP_CAMERA_SERVO_ENABLED

libraries/AP_Camera/AP_Camera_Servo.h

@@ -20,7 +20,7 @@
 
 #include "AP_Camera_Backend.h"
 
-#if AP_CAMERA_ENABLED
+#if AP_CAMERA_SERVO_ENABLED
 
 class AP_Camera_Servo : public AP_Camera_Backend
 {
@@ -47,4 +47,4 @@ private:
     uint16_t iso_counter;       // count of number of cycles iso output should be held open
 };
 
-#endif // AP_CAMERA_ENABLED
+#endif // AP_CAMERA_SERVO_ENABLED

libraries/AP_Camera/AP_Camera_config.h

@@ -23,6 +23,10 @@
 #define AP_CAMERA_RELAY_ENABLED AP_CAMERA_BACKEND_DEFAULT_ENABLED
 #endif
 
+#ifndef AP_CAMERA_SERVO_ENABLED
+#define AP_CAMERA_SERVO_ENABLED AP_CAMERA_BACKEND_DEFAULT_ENABLED
+#endif
+
 #ifndef AP_CAMERA_SOLOGIMBAL_ENABLED
 #define AP_CAMERA_SOLOGIMBAL_ENABLED AP_CAMERA_BACKEND_DEFAULT_ENABLED && HAL_SOLO_GIMBAL_ENABLED
 #endif